Anti-falling net mounting structure of inspection well cover

Abstract

The utility model discloses an anti-falling net mounting structure of an inspection well cover, which comprises an annular ring, an annular groove is arranged on the inner wall of the annular ring, a plurality of hooks for hanging an anti-falling net are arranged in the annular groove in a sliding manner, and compression springs are arranged among the hooks. The anti-falling net mounting structure has the advantages that the anti-falling net can be directly hung on one side through the anti-falling net mounting structure of the inspection well cover, after hanging is completed, the pressing block makes contact with the movable hook to limit the movable hook, the movable hook automatically moves towards the two sides and is fixed, the squatting time of workers is effectively shortened, and the safety of the workers is improved. And the anti-falling net can be hung conveniently, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, and in particular to the anti-fall net installation structure for manhole covers. Background Technology

[0002] With the development of urbanization in my country, the number of manholes is increasing, bringing with it more and more safety hazards. Damaged manholes, especially those without covers, frequently result in pedestrians falling in. Existing manhole covers typically have hooks on the inner wall, and safety nets are used to prevent falls.

[0003] When installing safety nets on existing manhole covers, workers typically need to squat down and rotate the cover along its edge. On one hand, squatting causes blood to rush to the head, especially when the head is tilted downwards, which can compress nerves and other parts of the body, negatively impacting their health. On the other hand, rotating the safety net increases the time spent squatting and tilting the head downwards, further increasing the worker's workload. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-fall net installation structure for manhole covers.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a manhole cover anti-fall net installation structure, including an annular ring, an annular groove is provided on the inner wall of the annular ring, a plurality of hooks for hanging the anti-fall net are slidably arranged in the annular groove, and a compression spring is provided between the hooks.

[0006] The hook is further configured to include a fixed hook and a movable hook, with the movable hook located on both sides of the fixed hook.

[0007] Further configured as follows: a limiting component is provided on the annular groove at the object position relative to the fixed hook. The limiting component includes a vertical slide rod provided on the annular ring, a limiting spring provided at the upper end of the vertical slide rod, an extension block provided on the inward side of the vertical slide rod, and two locking blocks provided vertically downward on the extension block. An oblique cut is provided on the opposite outer side of the locking blocks, and a locking groove is provided at the upward position of the moving hook.

[0008] The hook is further configured such that: the hook includes a rear end, a hook body is provided on the rear end, a groove is provided on one side of the annular groove, a side groove is provided on the inner wall of the groove that penetrates into the annular groove, a pressing block is inserted into the groove, a blocking rod extending into the side groove is provided on the pressing block, and a lifting spring is provided below the pressing block.

[0009] In summary, this utility model has the following beneficial effects: Through the anti-fall net installation structure of the manhole cover, the anti-fall net can be directly hung on one side. After hanging, the moving hook is restricted by the pressing block, causing it to move automatically to both sides and be fixed, which effectively reduces the time for workers to squat down, facilitates the hanging of the anti-fall net, and speeds up work efficiency. Attached Figure Description

[0010] Figure 1 A top view schematic diagram of the installation structure of the anti-fall net for manhole covers;

[0011] Figure 2 A three-dimensional schematic diagram of the installation structure of the anti-fall net for manhole covers;

[0012] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0013] Figure 4 This is a cross-sectional view of the position of the pressing block on the annular ring;

[0014] Figure 5 This is a structural diagram showing the position of the limiting component.

[0015] In the diagram: 1. Annular ring; 2. Annular groove; 3. Hook; 4. Compression spring; 5. Extension block; 6. Fixed hook; 7. Moving hook; 8. Limiting component; 9. Vertical slide bar; 10. Limiting spring; 11. Angled cut; 12. Slot; 13. Rear end; 14. Hook body; 15. Groove; 16. Side groove; 17. Pressing block; 18. Blocking bar; 19. Lifting spring; 20. Locking block. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] The anti-fall net installation structure of the manhole cover includes an annular ring 1, with a fixed hook 6 installed on the inner wall of the annular ring 1. Two annular grooves 2 are provided on both sides of the fixed hook 6 on the inner wall of the annular ring 1. Multiple movable hooks 7 are slidably installed within the annular grooves 2, and compression springs 4 are installed between the movable hooks 7. The compression springs 4 can push the movable hooks 7 away from the fixed hook 6. Both the movable hooks 7 and the fixed hook 6 include a rear end portion 13 located inside the annular groove 2, and a hook body 14 integrally extends from the rear end portion 13 within the annular groove 2.

[0018] A limiting member 8 is provided on the annular groove 2 at the position relative to the fixed hook 6, and the limiting member 8 is also fixed. The limiting member 8 includes a through hole passing through the annular groove 2 from top to bottom, and a vertical slide rod 9 is provided in the through hole. A limiting spring 10 is provided at the upper end of the vertical slide rod 9 to press the vertical slide rod 9 downward. An extension block 5 is provided on the side of the vertical slide rod 9 towards the center of the manhole cover. Two locking blocks 20 are provided vertically downward on the extension block 5, and oblique cuts 11 are provided on the opposite outer sides of the locking blocks 20. The two outermost movable hooks 7 are provided with slots 12. When the outermost movable hook 7 is pushed to the limiting member 8 by the compression spring 4, the oblique cuts 11 below the vertical slide rod 9 are locked in the slots 12, thereby achieving the purpose of fixing the movable hook 7.

[0019] The annular groove 2 has grooves 15 on both sides opposite the fixed hook 6. A side groove 16, which penetrates into the annular groove 2, is provided on the inner wall of each groove 15. A pressing block 17 is inserted into each groove 15, and a blocking rod 18 extending into the side groove 16 is provided on the pressing block 17. A lifting spring 19 is located below the pressing block 17. During production, the movable hooks 7 are moved towards the fixed hook 6, causing the blocking rods 18 to engage the two outermost movable hooks 7. The angle between the two blocking rods 18 and the center of the annular ring 1 is preferably less than 60 degrees to ensure that the operator does not need to rotate.

[0020] Anti-fall nets are attached to the fixed hook 6 and the movable hook 7.

[0021] In the factory-installed state, the movable hooks 7 on both sides are pushed towards the fixed hooks 6 and blocked at a certain position by the blocking rods 18. After the worker hangs the fall protection net on one side, they press the pressing blocks 17 on both sides. The pressing blocks 17 drive the blocking rods 18 downward to contact the restriction on the movable hooks 7. As a result, the movable hooks 7 are pushed to both sides by the compression springs 4. The two outermost movable hooks 7 hit the vertical slide bar 9. Since the lower end of the vertical slide bar 9 is inclined, it can be lifted to allow the outermost movable hooks 7 to pass. Finally, the vertical slide bar 9 falls down and gets stuck in the slot 12 to achieve fixation.

[0022] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A fall-prevention net installation structure for manhole covers, comprising an annular ring, characterized in that: The inner wall of the annular ring is provided with an annular groove, and multiple hooks for hanging the fall protection net are slidably arranged in the annular groove. Compression springs are provided between the hooks.

2. The anti-fall net installation structure for manhole covers according to claim 1, characterized in that: The hook includes a fixed hook and a movable hook, with the movable hook located on both sides of the fixed hook.

3. The anti-fall net installation structure for manhole covers according to claim 2, characterized in that: The annular groove is provided with a limiting component at the object position relative to the fixed hook. The limiting component includes a vertical slide rod provided on the annular ring, a limiting spring provided at the upper end of the vertical slide rod, an extension block provided on the inward side of the vertical slide rod, and two locking blocks provided vertically downward on the extension block. The locking blocks are provided with oblique cuts on their opposite outer sides, and the moving hook is provided with a locking groove at the upward position.

4. The anti-fall net installation structure for manhole covers according to claim 1, characterized in that: The hook includes a rear end, on which a hook body is provided. A groove is provided on one side of the annular groove. A side groove that penetrates into the annular groove is provided on the inner wall of the groove. A pressing block is inserted into the groove. A blocking rod that extends into the side groove is provided on the pressing block. A lifting spring is provided below the pressing block.

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